❤️ 环境准备
三台服务器，建立 Docker Swarm 集群，一个 Manager(node1)，两个 Worker(node2 + node3)。
- docker 版本：19.03.0-beta1
- mongo 版本：4.0.3
❤️ MongoDB 集群架构设计
架构图
高清图地址: https://www.processon.com/view/link/5a3c7386e4b0bf89b8530376
❤️ 搭建集群
1、【Manager】创建集群网络
docker network create -d overlay --attachable mongo
--attachable 允许其他容器加入此网络
2、创建 9 个 Data 服务，3 个 Config 服务，1 个 Global 模式的 Mongos 服务
2.1、【所有机器】创建相关文件夹
mkdir -p ~/mongo/config ~/mongo/shard1 ~/mongo/shard2 ~/mongo/shard3
2.2、【Manager】创建 stack.yml
version: '3.7'
services:
mongors1n1:
image: mongo
command: mongod --shardsvr --replSet shard1 --dbpath /data/db --bind_ip_all --port 27017
networks:
- mongo
environment:
- TZ=Asia/Shanghai
volumes:
- ~/mongo/shard1:/data/db
deploy:
replicas: 1
placement:
constraints:
- node.hostname==node1
mongors2n1:
image: mongo
command: mongod --shardsvr --replSet shard2 --dbpath /data/db --bind_ip_all --port 27017
networks:
- mongo
environment:
- TZ=Asia/Shanghai
volumes:
- ~/mongo/shard2:/data/db
deploy:
replicas: 1
placement:
constraints:
- node.hostname==node1
mongors3n1:
image: mongo
command: mongod --shardsvr --replSet shard3 --dbpath /data/db --bind_ip_all --port 27017
networks:
- mongo
environment:
- TZ=Asia/Shanghai
volumes:
- ~/mongo/shard3:/data/db
deploy:
replicas: 1
placement:
constraints:
- node.hostname==node1
mongors1n2:
image: mongo
command: mongod --shardsvr --replSet shard1 --dbpath /data/db --bind_ip_all --port 27017
networks:
- mongo
environment:
- TZ=Asia/Shanghai
volumes:
- ~/mongo/shard1:/data/db
deploy:
replicas: 1
placement:
constraints:
- node.hostname==node2
mongors2n2:
image: mongo
command: mongod --shardsvr --replSet shard2 --dbpath /data/db --bind_ip_all --port 27017
networks:
- mongo
environment:
- TZ=Asia/Shanghai
volumes:
- ~/mongo/shard2:/data/db
deploy:
replicas: 1
placement:
constraints:
- node.hostname==node2
mongors3n2:
image: mongo
command: mongod --shardsvr --replSet shard3 --dbpath /data/db --bind_ip_all --port 27017
networks:
- mongo
environment:
- TZ=Asia/Shanghai
volumes:
- ~/mongo/shard3:/data/db
deploy:
replicas: 1
placement:
constraints:
- node.hostname==node2
mongors1n3:
image: mongo
command: mongod --shardsvr --replSet shard1 --dbpath /data/db --bind_ip_all --port 27017
networks:
- mongo
environment:
- TZ=Asia/Shanghai
volumes:
- ~/mongo/shard1:/data/db
deploy:
replicas: 1
placement:
constraints:
- node.hostname==node3
mongors2n3:
image: mongo
command: mongod --shardsvr --replSet shard2 --dbpath /data/db --bind_ip_all --port 27017
networks:
- mongo
environment:
- TZ=Asia/Shanghai
volumes:
- ~/mongo/shard2:/data/db
deploy:
replicas: 1
placement:
constraints:
- node.hostname==node3
mongors3n3:
image: mongo
command: mongod --shardsvr --replSet shard3 --dbpath /data/db --bind_ip_all --port 27017
networks:
- mongo
environment:
- TZ=Asia/Shanghai
volumes:
- ~/mongo/shard3:/data/db
deploy:
replicas: 1
placement:
constraints:
- node.hostname==node3
cfg1:
image: mongo
command: mongod --configsvr --replSet cfgrs --dbpath /data/db --bind_ip_all --port 27017
networks:
- mongo
environment:
- TZ=Asia/Shanghai
volumes:
- ~/mongo/config:/data/db
deploy:
replicas: 1
placement:
constraints:
- node.hostname==node1
cfg2:
image: mongo
command: mongod --configsvr --replSet cfgrs --dbpath /data/db --bind_ip_all --port 27017
networks:
- mongo
environment:
- TZ=Asia/Shanghai
volumes:
- ~/mongo/config:/data/db
deploy:
replicas: 1
placement:
constraints:
- node.hostname==node2
cfg3:
image: mongo
command: mongod --configsvr --replSet cfgrs --dbpath /data/db --bind_ip_all --port 27017
networks:
- mongo
environment:
- TZ=Asia/Shanghai
volumes:
- ~/mongo/config:/data/db
deploy:
replicas: 1
placement:
constraints:
- node.hostname==node3
mongos:
image: mongo
command: mongos --configdb cfgrs/cfg1:27017,cfg2:27017,cfg3:27017 --bind_ip_all --port 27017
networks:
- mongo
ports:
- 27017:27017
environment:
- TZ=Asia/Shanghai
deploy:
mode: global
networks:
mongo:
external: true
2.3、启动服务，在 Manager 上执行
docker stack deploy -c stack.yml mongo
2.4、【Manager】查看服务的启动情况
docker service ls
正常情况下，会出现如下结果：
[docker@manager ~]# docker service ls
ID NAME MODE REPLICAS IMAGE PORTS
z1l5zlghlfbi mongo_cfg1 replicated 1/1 registry.docker-cn.com/library/mongo:latest
lg9vbods29th mongo_cfg2 replicated 1/1 registry.docker-cn.com/library/mongo:latest
i6d6zwxsq0ss mongo_cfg3 replicated 1/1 registry.docker-cn.com/library/mongo:latest
o0lfdavd8kpj mongo_mongors1n1 replicated 1/1 registry.docker-cn.com/library/mongo:latest
n85yeyod7mlu mongo_mongors1n2 replicated 1/1 registry.docker-cn.com/library/mongo:latest
cwurdqng9tdk mongo_mongors1n3 replicated 1/1 registry.docker-cn.com/library/mongo:latest
vu6al5kys28u mongo_mongors2n1 replicated 1/1 registry.docker-cn.com/library/mongo:latest
xrjiep0vrf0w mongo_mongors2n2 replicated 1/1 registry.docker-cn.com/library/mongo:latest
qqzifwcejjyk mongo_mongors2n3 replicated 1/1 registry.docker-cn.com/library/mongo:latest
tddgw8hygv1b mongo_mongors3n1 replicated 1/1 registry.docker-cn.com/library/mongo:latest
qrb6fjty03mw mongo_mongors3n2 replicated 1/1 registry.docker-cn.com/library/mongo:latest
m8ikdzjssmhn mongo_mongors3n3 replicated 1/1 registry.docker-cn.com/library/mongo:latest
mnnlm49b7kyb mongo_mongos global 3/3 registry.docker-cn.com/library/mongo:latest *:27017->27017/tcp
3、初始化集群
3.1 【node1】初始化 Mongo 配置集群
docker exec -it $(docker ps | grep "cfg1" | awk '{ print $1 }') bash -c "echo 'rs.initiate({_id: \"cfgrs\",configsvr: true, members: [{ _id : 0, host : \"cfg1\" },{ _id : 1, host : \"cfg2\" }, { _id : 2, host : \"cfg3\" }]})' | mongo"
3.2 【node1】初始化三个 Mongo 数据集群
docker exec -it $(docker ps | grep "mongors1n1" | awk '{ print $1 }') bash -c "echo 'rs.initiate({_id : \"shard1\", members: [{ _id : 0, host : \"mongors1n1\" },{ _id : 1, host : \"mongors1n2\" },{ _id : 2, host : \"mongors1n3\"}]})' | mongo"
docker exec -it $(docker ps | grep "mongors2n1" | awk '{ print $1 }') bash -c "echo 'rs.initiate({_id : \"shard2\", members: [{ _id : 0, host : \"mongors2n1\" },{ _id : 1, host : \"mongors2n2\" },{ _id : 2, host : \"mongors2n3\" }]})' | mongo"
docker exec -it $(docker ps | grep "mongors3n1" | awk '{ print $1 }') bash -c "echo 'rs.initiate({_id : \"shard3\", members: [{ _id : 0, host : \"mongors3n1\" },{ _id : 1, host : \"mongors3n2\" },{ _id : 2, host : \"mongors3n3\" }]})' | mongo"
3.3 【node1】将三个数据集群当做分片加入 mongos
docker exec -it $(docker ps | grep "mongos" | awk '{ print $1 }') bash -c "echo 'sh.addShard(\"shard1/mongors1n1:27017,mongors1n2:27017,mongors1n3:27017\")' | mongo "
docker exec -it $(docker ps | grep "mongos" | awk '{ print $1 }') bash -c "echo 'sh.addShard(\"shard2/mongors2n1:27017,mongors2n2:27017,mongors2n3:27017\")' | mongo "
docker exec -it $(docker ps | grep "mongos" | awk '{ print $1 }') bash -c "echo 'sh.addShard(\"shard3/mongors3n1:27017,mongors3n2:27017,mongors3n3:27017\")' | mongo "
4、连接集群
4.1 内部：在 mongo 网络下的容器，通过 mongos:27017 连接
4.2 外部：通过 IP:27017 连接，IP 可以为三台服务的中的一个的 IP
5、测试数据
# 【node1】连接集群
docker exec -it $(docker ps | grep "mongos" | awk '{ print $1 }') mongo mongos:27017
# 【node1】创建数据库
use test_db
# 【node1】允许数据库分片
sh.enableSharding("test_db", "hashed")
# 【node1】创建文档
db.createCollection("user")
# 【node1】分片设置
sh.shardCollection( "test_db.user", {_id:"hashed"} )
# 【node1】添加数据
for(var i = 0; i < 1000; i++) { db.user.insert({_id:i, name:"test" + i}) }
# 【node1】查询数据
db.user.find().pretty()
# 【node1】查询分片状态
db.user.getShardDistribution()
https://docs.mongodb.com/manual/core/ranged-sharding
https://docs.mongodb.com/manual/core/hashed-sharding/
❤️ 相关问题
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